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Discussion Starter · #1 ·
new motor and primary and secondary all rebuilt but it will only hit 7500 rpms and it should hit 8000 to 8200 rpm the carbs are clean and set what could be wrong

Thanks Craig
 

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Welcome to the forum! Does that sled have VES valves? If so, they could be sticky and not opening completely, which will kill top end RPM. If no valves, what weights/springs in the primary? Going to a lighter weight will increase maximum RPM...
 

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Discussion Starter · #3 ·
Thank you for replying, the sled has new springs, there are no valves and no Reed valves. Springs and weights are good, I think it might be the exhaust system.
Craig
 
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